Electrically-operated driving-gear.



J. A. ESSBERGER. ELECTRIGALLY OPERATED DRIVING GEAR.

APPLICATION FILED OCT. 4, 1910.

1,022,66 Patented Apr. 9, 1912.

3 SHEETS-S HEET 1.

v/Paw j 5 W J. A. ESSBERGER. ELEOTRIGALLY OPERATED DRIVING GEAR APPLICATION FILED 0014,1910 7 1,022,666. [Patent-ed Api .9,1912.-

3 SHEETS-SHEET 2.

J. A. ESSBB RGER.- ELEGTRIOALLY OPERATED DRIVING GEAR.

APPLICATION FILED 06124, 1910.

1,022,666, Patented Apr) 9, 1912.

3 $HEETS-SHEET 3.

UNITEET) S'IAJIES PATENT QFFKJE,

JOHN .QIUG'UETU'S ES STBEY 5E3, DE BEBJLIN SGHQI NEBERG, GIF K-MANY.

ELEGTEICALLY-OP ERATED DRIVINGGEARQ m nemen film Gctone'r 4, 1910.

To all wizo'm, i may; (OTB/067" a Ba ii known that L JOE-IN AUGUSTUSESS' a snbject 0;? the Empemr of Get-- 19 Miinchsznersitrasse,

g k N It is to prw imp, 111\ .m;-; by which wavy wide of ipeeds may be obtained in mm m 'mm one speed may 1 affair-(0d without shock to cfwi'rimi (irivinfi of such 1+ med rim of" the maximum in 5mm a and (.1 be cm'nbix, ipi'irm will enable the rvadiLv be Gil-=30 L? v methods 11121.

The 'fifllowin main idea of mine, of H29 pow" elubnl-Mions 'f 'mngenmnt of g wn'ing :1 11d mute (.0 this invention. Fig is a diagram an d Hm meniillusimb im-ates another Indium L lihii,

fipe cification 0! Letters Iatent.

r; O'LOL may be increased b warding Pa'fiseniefi APP}. Serial Nu. 585,294k.

021621011 shaft of gearing. Fig. 7, a

diagram similar in Fig.1 6 for the case in .Whibh the motm' armahn'es are switcheai in pawl! Fig. 8 is a sectiol 11 1; skewing one farm of fm'ryi': his, invon-i (ion iin'iiu Qfilfiitc Fig, in: mw'iher rrange-Infant o A f a train,

The vheel 3 arranged an a $115,? 53 whihh is 01' may be coupled :0 me shaft carrying av pinion 7 arranged ta drive the whee? on the slmfi The ccupling 4- acumen the 'iWO shafts 5 and (3 is )1 ernbay a HQUG coupling 1&- WiU be 2v ume following that Um ado 0 1 mmin' to the mininmm speed for which (he momwe urn wound is H142 sm'ne in but-h waters am} is 5:1. This quami. "655N561" wrlhiunsihe .-;poed range. In this czwe the speed rzfq 0f the earing: 2 anti 3 mm 3 he :1 and 21mm.- W011i 1 $35: The mw if. i the large motor 10 is set irimotisn by has ia'lecbzjneal songiirhng with w:- be

switched in.

in my the speed of the motor it) when fully e1rcited is Z) (the deiipminator indicates the speed ratio ot the gear) and when the Iield is least oxcited the speed of the motor will be taken as This assumption corresponds to the most frequent cas s occurring in practice.

It is here gain emphasized that the speed range of the motor should always be approximately the same the speed ratio of the gear if range is to take place without shock or mg.- tcrial fluctuations. if the greatest velocity ot the speed is to be further increased the following steps are taken :-The field F of the large motor is first switched in and armature of the motor to is switched in without resistance. As the lover speed of the motor is similar to the higher speed of the gear the motor 10 with normal. current takes up motor 1 and performs one half of the work. The speed on"? the motor 10 may be gently increased (by regulating the held) from The shafts?) and (3 are connected by a clutch which may I illustrated in Fig. 1 a magnetic clutch t.

is assumed to be applied. In order that the small motor may not be required to rotate at a speed exceeding 592 the magnetic coupling is released. The smallinotor then runs with no load at its highest speed 5n so that when passing from the larger motor 10 to the smaller. that is when reducing the speed, the transference from the larger inotor to the smaller is also ei'fected without shock. By providing a magnetic coupling a the advantage is obtained that the motor 1 maybe started with -no load. As soon as the electric motor 1 has reached the full (minimum) speed of rotation for which it is wound, the solenoid oi the magnetic clutch at is energized and immediately the driving wheel 7 on the motor 10 starts to-rotatc at- I revolutions per minute. If it is desired to the acceleration. over the entire motor 1 has been reached and the i be uncoupled in the. case 12 and 13 is provided as shown in lines in Fig. 1. i

The manipulation of the switch, the starter and the magnetic clutch and the motion of both field controllers may be effected by a common switch arm. The switch for the main current may also be effected by other suitable means for controlling their positions from a distance 6. g. by means of a contactor.

In ordinary cases two' motors and one car will be sullicientfor a speed range of a larger speed range may be obtained Y either mechanical or clectrical means.

in fig. there is illustrated an arrangement by which a greater speed range is obtained by mechanical means and this figure is an extension of the form of the invention illustrated in Fig. 1. An electric motor l lis directly or indirectly connected to the shaft and the speed of rotation of this motor may be varied between say and by controlling the field. The system illustrated in Fig. 3 is in otherrespects similar to that described with reference to Fig. 1. It will be understood of course that still further extensions may be made in a similar manner. I

In Fig. t the method of obtaining a still greater spcec range byclcctrieal means illustrated. In this case 1 and 1 denote two siniilafielcctric motors which are mechanicall coupled. The two motors may also be arranged otherwise On-the shaft of the notorsl and 1 there is arranged a pinion 9 gearing with a toothed wheel 3 on the shatt 5 which. is coupled to the shaft (3 by IiltlIlS of a magnetic clutch r. The shaft (5 has two motors 10' and 10 mounted thereon and the pinion 7 on the shaft 6 gears with the toothed wheel S'on the shaft, J. li hen starting with this arrangement, the motor 1 is started with or without resistance with no load while the clutch t uncoupled.

The armature ot the motor 1 rotates with the motor l and also runs with no load. The motor I may be arranged for instance for speeds between n and 5a and the motor 1 for speeds between 572 and 25a. By regulating the field in said motors therefore, the motor i may be increased in speed up to 521V which is also the minimum speed of the motor l \Vhcn the motor l reaches its maximum speed, the field of the motor 1" is switched in and this motor then takes up half the work whereupon the armature of the motor 1 is cut out and the motor 1 1 U RIG i. i from 5 1 to l a go in on t is El ormeiu l es in in lol. The motors .qi as umed to be shunt Wound hut also be ill wlieil for s.

primer res o'iotois. The mov also he misteroooe In D to r em th next s ceoi in its coo'xplto iniooum'n lichl n n tiring this me i; motor quick running motor is rammed \mtil the J running tor has reaches. the speed t 3h it normally rims when i lly energized, whoreupon the speed oi om'lioh of all motor is iiicrcz s ml by rc-zlucing the rolution 1s reecheo .119; motor normally P o Q- ..r 1 1: 1 Lou. i .iinsir 11o o.

eon-

wlziioh tin q iiii r runs when .r 3 one.

is then out off anti th the high moth" ty of the i ed with (l their t-mtecl some practical there illustrated a method of driving a type. For the sake of increasin the etety the magnetic or other clutch may he mechanically or electrically uncoupled by reser e of o. 'centrittugol coupling so as to pro t the speed of the motor. stages in- 7 creasing beyond the permissible limit.

In 8, 9, 10 and 11 there are illusembodiments of this invention. In 8, two motors m and m are connected by casing g. The motors are similarly wound and may be connected by magnetic coupling 7r When starting the (llS dl /r; is connected to the toothed Wheel "K The motors are arrongml in series so hot-h ery LiGX lop the full. power. The

i rotates ore quickly than the mol tl'ieprooortion oi? the intermediate e? 1*" 2". r T'L develops a cor respond torque owl as soon the spcerl the nonrrsl minimi'mi of. the motor 5, so. its field is fully ehergizeai the clutch is is connected with the disk tors are first of all coi'mectccl in What in it he called electrical and roe-- ohenicojl series and are then connected in. parallel. when connected in parallel the speed of the motor m may be increased m told by reducing the fichl.

According to the form shown in Fig. 9 a similar arrangement is illustrated which is s'iiiteclfor driving the car of a train. Both the motors m anrl m actuate a shaft o through the intermediate gem: r and 7*. El iotors m and in? may also he urrzmogecl on separate MEGS "and the mechanical coupling may be obtained through the Wheels of the car and the rails. Y

in 10 three motors are illnstrateol in lorin shitecl for (hiring .i capstan or gun mg mechanism. The motor m starts motor m through a magnetic reversible 1-72 and the ll'lOi'Ol m starts the through the nmgnetic clutch m.

of. ratio of the ma gnetic reversing m fl t? and the speed range of the chatch motor m is also 1.1? and the two other motors have a speoil ratio 1:6 1'15 respectively the total speed ratio of the system is 1:120,

The speed of the motor m may be vairieal from 7 to 1.470 revolutions per i'oinotc. The application of e ignetic reversing clutch has the exli'enta that with the lowest elocities the dire Ion of rotation may be easily and speed" reversel. in Fig. 11.

12C ships capstan by means of two motors.

The motor mi one the motor m are assumed as shunt motors soul the armstu es are arr: rigged in series while tho/capstan pulling. The motor m is directly" (301lnoctecl to the shaft- 8 while the motor m (iriv s the some shaft through th. gear r and the magnetic cou gli starts.

soon as the capstan hrst cut out said suns is only switched in with a starting resistance when the armature has reached its full speed 0. minimum limit) when the lield is fully energized. Iloth motors then run in parallel but with different speeds. As soon as the motor 111 exceeds its highest permissible speed the magnetic clutch m is deenergized and the motor 712 rotates with no load. The motor 912% then per forms the work alone. in this way the speed of the capstan may be varied from 1 :30 with out employing any regulating resistances.

It will be seen that according to the present invention the rotarydriven shaft is operated by a plurality of motors (m and m in Fig. 11) which are in mechanical series v(through the gearing r "1" 7*), while the first. motor m in said series is coupled to the driven shaft .9 for the lower speed range of the said shaft. The second motor m may then be operatively con nected. through the clutch m to the shaft s for the succeeding (in this case the highest) speed range.

It will be understood that the forms of the invention described above are only taken as typical applications and do not by any means-exhaust the uses to which the present invention may be applied.

I claim 1. In combination rotary shaft, :1 plurality of electric motors for driving said shaft, intermediate gearing between said motors and said sl1aft,-said motors being distributed on ditferent shafts of said gearing and the speed ratio of the gearing between the motors correspoinling substantially to the speed range of said motors.

'2. In combination a rotary shaft. gearing through which said shaftis driven and means for controlling the speed of said shaft over a large range without shock comprising motors on dill'erent shafts of said gearing, the specd range of each of said motors being substantially equal to the sueed ratio of the gearing arranged between it and the next and means for controlling the speed of said motors.

I-l. In combination, a rotary shaft, a plurality of gearing pairs in series and through which said shaft may be driven, shafts carrying said gearing pairs, electric driving 7 means on one shaft of said gearing, the speed range of said driving means being substantially equal to the speed ratio of the gearing between it and a further shaft in the series of gearing pairs and electric driving means on said further shaft.

4:. In combination, a rotary shaft, a plurality of gearing pairs in series and through which said shaft; is driven, shafts carrying said gearing pairs, a motor on one shaft of the gearing, the speed range of said. motorbeing substantially equal to the speed ratio of the gearing between it and a further shaft of said gearing, a clutch between said motor driven shaft and said further shaft and a motor on said further shaf 5. In combination, a rotary shaft, a plurality of gearing pairs in series and through which said shaft is driven, shafts carrying said gearing pairs, a motor on one shaft of the gearing, the speed range of said motor being substantially equal to the speed ratio of the gearing between it and a further shaft on said gearing, a magnetic clutch bet-ween said motor driven shaft and said further shaft.

6. In combination, a rotary shaft, a plurality of gearing pairs in series and through which said shaft is driven, a plurality of shafts carrying the members of said gearing pairs, a plurality of series arranged motors mechanically coupled and arranged to drive said earin one of said motors bein ar 'anged to drive its shafts through a speed range of approximately a to 5% and an other being arranged to drive at speeds ranging from 5m to 25m whereby the variation in speed of the driven shaft may be effected.

'7. In combination, a rotary shaft, gearing arranged to drive said shaft, shafts carrying said gearing, a plurality of motors on each shaft of said gearing, the collective speed range of said motors bcingsubstantially similar to the speed ratio of said in- I termediate gearing.

S. In combination, a rotary shaft, gearing arranged to drive said shaft, shafts (iarrying said gearing, double motors on each shaft of said gearing the speed range of said motors being substantially similar to the speed ratio of said intermediate gearing.

In testimony whereof I atlix my signature in presence of. two witnesses.

JOHN AUGUSTUS ESSBE 1G ER.

IVitnesses oLDmL-m IIA U or, Hnxny Hasrna. 

